Bug: sam sync nested_stack_manager.py: collections.OrderedDict' object has no attribute 'append' #8148
Description
Description:
Running sam sync and it fails when it tries to call append on an OrderedDict
Steps to reproduce:
Observed result:
ran with --debug, but I've removed most of the output to avoid sharing non-public information.
025-07-01 18:43:44,735 | Auto creating dependency layer for each function resource into a nested stack
2025-07-01 18:43:44,736 | 7 resources found in the stack StackDataSync
2025-07-01 18:43:44,736 | Found Serverless function with name='DataSyncFunction' and CodeUri='../../dist/data-sync'
2025-07-01 18:43:44,736 | --base-dir is not presented, adjusting uri ../../dist/data-sync relative to
/Users/artpeel/code/vg/customer-service/apps/data-sync/template.yml
2025-07-01 18:43:44,738 | 7 resources found in the stack StackDataSync
2025-07-01 18:43:44,738 | Found Serverless function with name='DataSyncFunction' and CodeUri='../../dist/data-sync'
2025-07-01 18:43:44,743 | There is no customer defined id or cdk path defined for resource BPIEventsQueue, so we will use the
resource logical id as the resource id
2025-07-01 18:43:44,743 | There is no customer defined id or cdk path defined for resource BPIEventsDLQ, so we will use the resource
logical id as the resource id
2025-07-01 18:43:44,744 | There is no customer defined id or cdk path defined for resource BPIEventsFunction, so we will use the
resource logical id as the resource id
2025-07-01 18:43:44,744 | Auto creating dependency layer for each function resource into a nested stack
2025-07-01 18:43:44,745 | 3 resources found in the stack StackEvents
2025-07-01 18:43:44,745 | Found Serverless function with name='BPIEventsFunction' and CodeUri='../../dist/events/src/handlers'
2025-07-01 18:43:44,745 | --base-dir is not presented, adjusting uri ../../dist/events/src/handlers relative to
/Users/artpeel/code/vg/customer-service/apps/events/template.yml
2025-07-01 18:43:44,746 | Telemetry endpoint configured to be https://aws-serverless-tools-telemetry.us-west-2.amazonaws.com/metrics
2025-07-01 18:43:44,747 | Telemetry endpoint configured to be https://aws-serverless-tools-telemetry.us-west-2.amazonaws.com/metrics
2025-07-01 18:43:44,747 | Unable to find Click Context for getting session_id.
Error: 'collections.OrderedDict' object has no attribute 'append'
Traceback:
File "click/core.py", line 1082, in main
File "click/core.py", line 1697, in invoke
File "click/core.py", line 1443, in invoke
File "click/core.py", line 788, in invoke
File "samcli/cli/cli_config_file.py", line 347, in wrapper
File "click/decorators.py", line 92, in new_func
File "click/core.py", line 788, in invoke
File "samcli/lib/telemetry/metric.py", line 185, in wrapped
File "samcli/lib/telemetry/metric.py", line 150, in wrapped
File "samcli/lib/telemetry/event.py", line 376, in wrapped
File "samcli/lib/telemetry/event.py", line 368, in wrapped
File "samcli/lib/cli_validation/image_repository_validation.py", line 111, in wrapped
File "samcli/lib/telemetry/metric.py", line 104, in wrapped
File "samcli/lib/utils/version_checker.py", line 43, in wrapped
File "samcli/cli/main.py", line 95, in wrapper
File "samcli/commands/_utils/cdk_support_decorators.py", line 40, in wrapped
File "samcli/commands/_utils/command_exception_handler.py", line 89, in wrapper_command_exception_handler
File "samcli/commands/_utils/command_exception_handler.py", line 69, in wrapper_command_exception_handler
File "samcli/commands/sync/command.py", line 229, in cli
File "samcli/commands/sync/command.py", line 432, in do_cli
File "samcli/commands/sync/command.py", line 475, in execute_infra_contexts
File "samcli/lib/sync/infra_sync_executor.py", line 169, in execute_infra_sync
File "samcli/commands/build/build_context.py", line 291, in run
File "samcli/commands/build/build_context.py", line 397, in _handle_build_post_processing
File "samcli/lib/bootstrap/nested_stack/nested_stack_manager.py", line 103, in generate_auto_dependency_layer_stack
File "samcli/lib/bootstrap/nested_stack/nested_stack_manager.py", line 131, in _add_layer
An unexpected error was encountered while executing "sam sync".
Search for an existing issue:
https://github.com/aws/aws-sam-cli/issues?q=is%3Aissue+is%3Aopen+Bug%3A%20sam%20sync%20-%20AttributeError
Or create a bug report:
https://github.com/aws/aws-sam-cli/issues/new?template=Bug_report.md&title=Bug%3A%20sam%20sync%20-%20AttributeError
Expected result:
The stack to be created
Additional environment details (Ex: Windows, Mac, Amazon Linux etc)
{
"version": "1.142.1",
"system": {
"python": "3.11.10",
"os": "macOS-15.5-arm64-arm-64bit"
},
"additional_dependencies": {
"docker_engine": "27.4.0",
"aws_cdk": "Not available",
"terraform": "Not available"
},
"available_beta_feature_env_vars": [
"SAM_CLI_BETA_FEATURES",
"SAM_CLI_BETA_BUILD_PERFORMANCE",
"SAM_CLI_BETA_TERRAFORM_SUPPORT",
"SAM_CLI_BETA_PACKAGE_PERFORMANCE",
"SAM_CLI_BETA_RUST_CARGO_LAMBDA"
]
}